If you had a gut instinct something is wrong... is it usually right?

I learned my so called best friend was stealing item from my small business (a bookstore) and lying to two clients about not receiving their money.

When I confronted her with all the evidence, she started crying suddenly (crocodile tears) and claiming she'll pay it all back, begging me not to end our friendship. She told me to meet her up in her house. I had a real bad feeling (I felt as if this was already a deja-vu... as if I had seen this happen before where someone goes alone and something happens) and decided to take 3 people with me to collect my stuff; my father, my sister and my past supervisor. She reacted with anger that I was so distrusting, that I had to bring others with me and blocked me immediately.

Was my gut instinct telling me something? For the first time, I didn't feel good coming by myself. I felt something was not right.
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The fact that she got so angry and defensive that I didn't come unaccompanied (she expected me to still trust her) tells me something is wrong.
If you had a gut instinct something is wrong... is it usually right?
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